First I would like to thank my coauthors, for giving me the chance to participate in this awesome project, and especially Eduardo, who asked me some months ago if I was interested in this exciting venture. I had no time at all—neither then nor the weeks and months that followed—but I could not say no!

Thanks to my friends, coworkers, and team partners in Cologne, Bochum, India, New York, and around the world, who constantly had to listen to my gibberish about this book, eccentric JavaScript vectors, markup obfuscation, and breaking filters. I hope it was not too tedious, and I'm sorry if I broke your filters and protection mechanisms all the time. I know well enough that developing Web sites is a terrible job. Special thanks go to Markus, Johannes, and Arno. Thanks also to Jacek for the same things mentioned earlier; it was always a pleasure working with you.

Same for Dr. Girlfriend—you had to bear with me drifting away to obfuscation land often enough. I hope I can stress your patience with that for some more years and… God bless the dress! Thanks a lot for being there and for being awesome.

Thanks go also to the sla.ckers.org users who contributed knowledge and helped discover the fun in browser and Web security, stole my precious time with amazing contests, and helped me as well as the whole team to advance and gain more insight into the quirky browser world day by day. Edward, Dave, Adam, Arshan, and others, you have written and continue to write nice filters. I'm sorry for breaking them now and then. Many thanks go to Roberto Salgado for helping with the SQL chapter.

Last but not least, thanks to my family and, especially, to my baby brother, who understood nonalphanumeric JavaScript obfuscation in half an hour and even helped me shorten a vector for a challenge by one character—without even knowing JavaScript.

And now…motor sports!

First I would like to thank my wife, Zheng Yi, who followed me all the way from China to share her life with me on the other side of the world; my mother and mi abuelita for always supporting me to do what I like; and all my friends and family for being there when I needed them.

I would also like to thank my colleagues and friends at Google and Alibaba for allowing me to learn so much from them, as well as the place that made me love security, elhacker.net. Thank you all.

First I would like to thank my wife, Samantha, for her patience while I wrote this book, and for always being there. You are truly my inspiration every day. I would also like to thank my beautiful little girl, Chloe, for making me watch Shrek a million times (I never got bored) and lighting up our world.

I would like to thank Eduardo, Mario, and David for allowing me to work with them on this book and for being generally awesome.

Finally, I would like to thank the slackers and security community for finding and posting brilliant research, Dave Ross for taking a chance on me and building great things, and Manuel Caballero for being the most innovative and brilliant colleague I've ever worked with.

Thanks to Eduardo, Mario, and Gareth for being great to work with on this book, and for being awesome friends in general. Thanks to Romain Gaucher, Mike Cooper, Jayson Christianson, John Pursglove, and many other former and current colleagues for teaching me almost everything I know about security. Thanks to my parents, Jim and Kathryn, for teaching me how to think critically and embrace who I am. Finally, thanks to my family, Tina and Lydia, for their patience, understanding, and continuous support, and for making it all worth it.